human sperm cell |
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| navigate by keyword : abnormal analyses best biology breeding care cell chromosome close conceiving concept conception count dimensional dna fastest fertility fertilization genes genetic group head health human impotence infertile infertility information insemination intrauterine libido life macro male medical medicine microbiology microscopic mitochondria new normal nucleus pregnancy problem problems quality reproduction sample science semen sex sexuality sperm spermatozoa strongest swimmer swimmers tail three winner |
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| Human sperm cell and male fertility concept with a close up of microscopic spermatozoa cells swimming towards an elusive female egg as a medical reproduction symbol of genetic information transfer and conception. |
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